3
Sensors connected on the CAN bus can have their address changed using
ENGINEER’S
menu 27 (Described in appendix:1).
Please note:
Connected sensors are recorded as present by the panel.
If a sensor is removed, and then the panel is switched on, a fault will occur showing the
missing sensor.
Use
ENGINEER’S
menu 16 to clear all addresses if required.
Button action on the Combi panel can be protected by a Key lockout connection to
prevent misuse. However, muting the buzzer which sounds if an event occurs can still be
silenced by pressing the
ACCEPT
button
(1)
.
On board relays with voltage free contacts indicate alarm and fault states and additionally
these relays are used for voting whereby sensors can be grouped and the relay is
activated when a number of sensors have gone into alarm. The last four relays labeled
OPT5, 6, 7 and 8 can also be used for time weighted average alarms covering the
requirements of 15 minute and 8 hour measurements. Additionally, all 8 onboard relays
and the first 16 of the external relays have a programmable delay to de-energise
parameter which for example allows for fan evacuation of a space containing detected
gas. These relays and the first 16 relays on the remote relay board can be set to be
normally energised or de-energised.
Front panel LED’s indicate the general state of the panel. The red alarm LED will flash for
new alarms until accepted/muted when it stays on constantly until reset. The amber fault
LED comes on if a fault is present. If any sensor channel is inhibited the amber inhibit
LED will be on.
Additional reset and mute terminals are available to allow remote action in the event of an
alarm or fault condition. Test facilities are included in the engineer’s menu, which allow
these relays to be manually activated during commissioning.